Peegee hydrangea (Hydrangea paniculata) is a deciduous shrub that will display masses of big, showy blooms in midsummer after most shrubs have finished blooming for the season. The peegee's white blooms will turn pink, and before the blooms fade in September they will turn a lovely bronze. The peegee hydrangea bush has a pleasant, rounded shape, and although most bushes will attain heights of 10 to 15 feet, peegee hydrangea can sometimes grow as tall as 25 feet.
Plant peegee hydrangea where it will be exposed to bright sunlight for most of the day. However, if you live in a hot, dry climate, plant hydrangea where it will be protected from hot afternoon sunlight.
Water peegee hydrangea deeply once or twice each week; avoid more frequent, shallow waterings. Watering deeply will build a deep root system and a healthier shrub.
Sprinkle a balanced, granular fertilizer around the peegee hydrangea's drip line in March, May and July, applied according to the manufacturer's directions. The drip line is the perimeter of the shrub, where the outermost branches will drip.
Spread 2 to 3 inches of mulch around the peegee hydrangea, but leave 8 inches uncovered around the base of the shrub so the mulch won't pile up against the base of the trunk. An organic mulch such as bark chips or pine needles will retain moisture and help to control weeds.
Prune peegee hydrangea in late winter or early spring to maintain the desired shape and size. To encourage large blooms, prune the previous year's growth back, leaving just a few buds on the base of each stem. Pruning will result in a smaller plant with larger blooms. If you want peegee hydrangea to grow larger, prune the tips of the shoots lightly or not at all.